In the Cost Approach, Ei is a cost. Just like contractor profit is a cost. MSV estimates typical contractor costs in its RCN data; they do so by surveying contractors as well as reviewing builder contracts. Appraiser's need to estimate EI. Appraisers can do so by surveying developers (as I do). Both contractor profit and EI is depreciated over time. In the context of the cost approach, EI for the improvements are not attributable to the land, because once the improvements are fully depreciated, so is any EI that is attached to them.
I hear the argument that EI is not applicable to homes a lot. At least one person in my residential cost approach argues that the owner who is building their own home doesn't require EI. I find this position to be logically as well as economically unsupportable. Sometimes the person will tell me, "Well, an owner-user who is building their own home will spend the money that a developer would make on additional upgrades to the home they are building?" That is a logical inconsistency because if that were the case, one is not comparing like for like. Here is the thought problem I pose:
Assume YOU have a choice. You can
A. You are highly confident that you can build the home you want for $500,000. This includes everything (land + improvements). It will take 9 months to do so. You assume all risks as the developer.
B. You can buy the exact same house for $500,000 (no uncertainty) and let someone else take on all those risks. All you are doing is purchasing the house that you want that is complete and ready to go.
There are no differences between the two houses or sites, or location. They are exactly the same (like for like).
Under option A, you'll have to manage the process, assume all the risk for something going wrong in the 9-months it takes to construct the improvements as well as the market risk for something changing until it is complete.
Under option B, you have no market risk prior to the purchase, no construction risk, and other risks.
The only risk both homes share is what happens after they are purchased.
I ask the class:
Given choices A or B, which would you choose?.
The answer is almost invariably, I'll pay $500k with no risk and no headaches if the two houses are exactly the same.
Then I'll ask, Ok. Would you take option A if you think you could do it for $495k vs. the $500k option B?
Typically, the answer is, "No. I'll pay $500k. It isn't worth a $5k discount to assume all that risk."
I then ask, "What about $490k? What about $480k? What about $470k?, etc.?"
I start getting takers around $480 and almost everyone has signed on by $450k to $460k.
That is EI. That difference (4% to 10%) is what it would take to motivate (
incent) the participants (appraisers) in my classes to take on the project. The project that is worth $500k will be self-developed if they can do it for at a cost of 4-10% less than what it will be worth. And this is a hypothetical where no money is actually at risk. When it comes time to put up real money, their risk tolerance may be a bit higher and require more incentive.
Most rational players, being fully informed of the risks, given the choice between purchasing a home already built and going through the process of building that same exact home on their own, which will be worth the same $500k when all is said and done, will choose to pay the $500k for what is done and avoid all headaches and risks of finishing an alternative house that is exactly the same and will cost them the same $500k.
Enough rational players, being fully informed of the risks, would take on the risks of building the house themselves if they can do it for $450k; 10% would motivate almost all the participants in my class to take on the risk.
It doesn't matter (in the cost approach) if they actually make 10% when all is said and done. They could make more or less. What they actually make when all is said and done is their Entrepreneurial Profit.
What does matter is how much they need to be incentivized to take on the risk. That is a cost included in the Cost Approach because without it, the indicted value will not be market value (the CA will produce an indicated value lower than what the market value is because the market requires EI as a cost component of the Cost Approach).
EI must be depreciated over the life of the improvements. If not, it would flow to the land. But land is valued at its H&BU
as-vacant and ready for development. Ready for development means no improvements. EI is a cost associated with developing the improvements*. It is earned through the construction and completion of the improvements and it is depreciated over the life of the improvements.
*Sites in the cost approach are "vacant, ready for development". Raw land may not be a site and there is certainly EI earned by getting raw land to a site, ready for development. That is already baked into the site value in the cost approach.